Embedding Google Apps Script in an iFrame

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Google had just recently enabled this feature. It has been under a ‘feature request’ status for quite a long time. Link here

You can now explicitly define X-Frame-Options.

To allow embedding under another domain, the option should be HtmlService.XFrameOptionsMode.ALLOWALL

Google documentation on the subject:

https://developers.google.com/apps-script/reference/html/html-output#setXFrameOptionsMode(XFrameOptionsMode)

Example:

function doGet() {
    return HtmlService.createTemplateFromFile('form.html')
        .evaluate() // evaluate MUST come before setting the Sandbox mode
        .setXFrameOptionsMode(HtmlService.XFrameOptionsMode.ALLOWALL);
}

Hope this helps!

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